Overview
A full geotechnical design package for an underground powerhouse cavern including 3D FEA, staged excavation sequencing, and optimized support systems.
The model addressed large-span stability, bedding-controlled deformations, and construction-phase monitoring requirements for the owner and EPC contractor.
Photos & video
Cavern design walkthrough
Staged excavation and lining activation overview.
Challenges
- Large span in moderately jointed rock
- Creep-sensitive bedding planes
- Tight construction schedule
Outcomes & solutions
- 3D FEA with staged excavation sequence
- Optimized rock bolt and shotcrete layout
- Construction monitoring plan
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